TECHNICAL NOTE
Power Management LSI Series for Automotive Body Control
Regulators with
Voltage Detector and
Watchdog Timer
BD3004HFP,BD3005HFP
Description
The BD3004HFP,BD3005HFP low bias current regulator and watchdog timer features a high 50 V breakdown voltage and is compatible
with on-board vehicle microcontrollers. It offers an output current of 500 mA while limiting bias current to 80 µA (Typ.). The series supports
the use of ceramic capacitors as output phase compensation capacitors.The reset detection voltage can be changed by connecting a
resistor to the Vs pin.(BD3004HFP)The watchdog timer can be switched on and off using the INH pin input logic.(BD3005HFP)
Features
1) 5 V/500 mA regulators for microcontrollers
BD3004HFP: Adjustable detection voltage (Vs pin)
BD3005HFP:Built-in watchdog timer reset circuit (INH pin: watchdog timer on/off)
2) Super-low bias current: 80 µA (Typ.)
3) Low-saturation voltage type P-channel DMOS output transistors
4) High precision output voltage: 5 V ±2%
5) Low-ESR ceramic capacitors can be used as output capacitors
6) Vcc Maximum applied voltage: 50 V
7) Built-in overcurrent protection circuit and thermal shutdown circuit
8) Built-in reverse connection breakdown prevention circuit
9) Back current flow protection during sudden battery failures, making it a highly reliable 5 V regulator.
10) HRP7 package
Applications
Onboard devices (Vehicle equipment, Car stereos, Satellite navigation systems, etc.)
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limit
Unit
+50*1
V
Vcc applied voltage
Vcc
−15 to
Vs pin voltage(BD3004HFP)
Vs
−0.3 to +15
V
INH pin voltage(BD3005HFP)
VINH
−0.3 to +15
V
Regulator output pin voltage
VOUT
−0.3 to +15
V
Reset output pin voltage
VRO
−0.3 to +15
V
Watchdog input pin voltage
VCLK
−0.3 to +15
V
Reset delay setting pin voltage
VCT
−0.3 to +15
V
Output current
IOUT
500
mA
Pd
1.6*2
W
Topr
−40 to +125
°C
Tstg
−55 to +150
°C
Tjmax
150
°C
Power dissipation
Operating temperature range
Storage temperature range
Maximum junction temperature
*1 Must not exceed Pd.
*2 Reduced by 12.8 mW/°C over 25°C, when mounted on a glass epoxy board (70 mm × 70 mm × 1.6 mm).
Ver.B July 2006